Haliotidae familia_authority = Rafinesque (Constantine Samuel Rafinesque), 1815 genus = Haliotis genus_authority = Linnaeus (Carolus Linnaeus), 1758 type_species = Haliotis asinina type_species_authority = Linnaeus (Carolus Linnaeus), 1758 subdivision_ranks = Species subdivision = Many, see species section (#Species).

Abalone (from Spanish Abul�n) are small to very large-sized edible sea snails, marine (marine (ocean)) gastropod mollusks in the family (family (biology)) Haliotidae and the genus Haliotis (syn. Sulculus). Family Haliotidae has no subfamilies. Common names for abalones also include ear-shells, sea-ears and Venuss-ears, as well as muttonfish or muttonshells in Australia, ormer in Jersey and Guernsey, perlemoen in South Africa and p?ua in New Zealand.

There is only the one genus in the family Haliotidae, and about four to seven subgenera. The number of species recognized worldwide is about 100.

The shells of abalones have a low and open spiral structure, and are characterized by several open respiratory pores in a row near the shells outer edge. The thick inner layer of the shell is composed of nacre or mother-of-pearl, which in many species is highly iridescent (Iridescence), giving rise to a range of strong and changeable colors, which make the shells attractive to humans as decorative objects, and as a source of colorful mother-of-pearl.

The flesh (the adductor muscle) of abalones is widely considered to be a desirable food.